6mm 105 Hornady BTHP--low impact bullet test

[T-Stick]

You are very generous however my 243 is a 1/9.25 twist so most VLDs above 90 grain won't stabilize. I'm guessing your above 100 grain bullets wont stabilize so I can't give them a fair test. The Hornady has a mild secant ogive and does stabilize. I'm thinking maybe I should try opening the hollow point more with a larger drill bit.

My top long range performer right now is the 90 grain ELDX but I'd like a heavier bullet and more BC.

 

[T-Stick]

I was using a .040 drill bit. I just ordered some .052 drill bits. I will try them to enlarge the hole and then retest.

 

[Gribley]

Would the DTAC nose ring cutter work on these bullets? I wonder if anyone has tried that. @Formidilosus ?

 

[Formidilosus]

Would the DTAC nose ring cutter work on these bullets? I wonder if anyone has tried that. @Formidilosus ?

Yes it would work.

 

[wind gypsy]

You are very generous however my 243 is a 1/9.25 twist so most VLDs above 90 grain won't stabilize. I'm guessing your above 100 grain bullets wont stabilize so I can't give them a fair test. The Hornady has a mild secant ogive and does stabilize. I'm thinking maybe I should try opening the hollow point more with a larger drill bit.

My top long range performer right now is the 90 grain ELDX but I'd like a heavier bullet and more BC.

How do you know that the bullet was stable at the lower MV you tested?

I dont think low MV testing for low impact velocity is always representative of reality because bullet stability and RPMS are significantly different.

 

[Gribley]

lol so the nose ring cutter is $575. I would need to shoot a lot of bullets to recoup that.

 

[beerbucksducks]

lol so the nose ring cutter is $575. I would need to shoot a lot of bullets to recoup that.

There was one for sale in the classifieds not too long ago.


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[T-Stick]

How do you know that the bullet was stable at the lower MV you tested?

I dont think low MV testing for low impact velocity is always representative of reality because bullet stability and RPMS are significantly different.

Your assumption is correct and therefore my data base only confirms tumbling when started at a low velocity and does not accurately represent extended ranges. I since found the bullet needs at least 2500 fps starting velocity to stabilize and needs yet more velocity for good accuracy. I also found that enlarging the HP with the next size up drill bit degraded accuracy. So the only thing I can do is test at extended ranges to get accurate results. I think this is due in part to having only a 1-9.25 twist.

 

[OFFSHORE]

Your assumption is correct and therefore my data base only confirms tumbling when started at a low velocity and does not accurately represent extended ranges. I since found the bullet needs at least 2500 fps starting velocity to stabilize and needs yet more velocity for good accuracy. I also found that enlarging the HP with the next size up drill bit degraded accuracy. So the only thing I can do is test at extended ranges to get accurate results. I think this is due in part to having only a 1-9.25 twist.

Thank you for your efforts. This bullet shoots/kills very good for a fella at the range I run into a lot. He is shooting it from a 6XC and does clean/open the tips. This bullet and the 105gr. Barnes Match Burner (I hear great things on the 112gr. BMB) are in a group of 6MM bullets I would like to try. Keep up the data reports, especially on-game performance. Thanks again.

 

[T-Stick]

I open the Hornady tips with an .040 drill bit and they are doing fine for deer but not enough expansion for ground hogs. If I open them more accuracy suffers.

I can open the 105 Barnes Match by .050 and they shoot well and open nicely on ground hogs. I haven't shot any deer yet with them.

So many bullets to try and not enough tags lol

 

[OFFSHORE]

I open the Hornady tips with an .040 drill bit and they are doing fine for deer but not enough expansion for ground hogs. If I open them more accuracy suffers.

I can open the 105 Barnes Match by .050 and they shoot well and open nicely on ground hogs. I haven't shot any deer yet with them.

So many bullets to try and not enough tags lol

Amen brother!!! I don't have my 6mm built yet, but I live in N. Central Florida and have a target rich environment with hogs. Right now things are very dry and in drought conditions so they are holed-up in the bay heads and 50yds. would be a longshot there which doesn't lead to good bullet testing in my opinion. I feel a good mature boar hog is about the best real life test media a hunter/shooter can have. I've been gathering bullets I would like to hunt with and when my rifle is completed I'll be getting lots of range time looking for my load, and hopefully the rains will come and the hogs will be back in the hay fields and mellon/peanut fields for bullet testing.

 

[beerbucksducks]

Has anyone tried the 105 MB in a 1-9.25 .243 win? Are they more finicky than the 105 Hornady? I’m considering trying one of the two in my Ruger Hawkeye if I don’t find a load for the 95NBT.


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